Bob, I do care about all of these! Thanks!
I do not think that a contol system has significant impact loads. Anyone has specific number on this?
I think some considerations are similar to those in determining design allowables for composite structures, namely, the effect of temperature, moisture and impact dammage. It would be wise to check that neither maximum tension nor compression strains of the tube exceeds the design allowables. I expect these tubes to be buckling limited, not strain limited.